Resolved Failed update to 18.0.26

[vardar]

when i try to upgrade from version 18.0.25 to version 18.0.26 the update fails, with the error: "ERROR while trying to check the hostname". Can anyone help me out?

 

[IgorG]

Have you tried solutions from suggested KB articles Search results – Plesk Help Center ?

 

[vardar]

Have you tried solutions from suggested KB articles Search results – Plesk Help Center ?

Yes, and the host file looks correct. I have also already upgraded from version 18.0.24 to 18.0.25 with no problems.
If I look at the log I find written:

 Trying to resolve hostname 'mysite.com' and validate its IP address...
Can not bind a socket to address mysite.com:715 - Cannot assign requested address

EDIT:

I solved.
In Tools & settings -> server setting I changed the full hostname field from "mysite.com" to "hostname.mysite.com" and so it worked.